Soft sealing butterfly valve with low torque

Abstract

The utility model relates to the field of butterfly valves, and discloses a low-torque soft sealing butterfly valve which comprises a valve body, the top end of the valve body is fixedly connected with a fixing rod, the top end of the fixing rod is fixedly connected with a supporting plate, the top end of the supporting plate is fixedly connected with a box body, and the inner wall of the box body is connected with a worm used for reducing torque through a rotating piece. The rear end of the worm is fixedly connected with a rotating assembly, the right end of the worm is in meshed connection with a worm gear used for reducing torque, the inner wall of the worm gear is connected with an elastic piece used for sealing through an opening and closing assembly, and the inner wall of the valve body is fixedly connected with a valve seat. According to the butterfly valve, the rotating disc is rotated, the worm is driven to rotate through the rotating rod, the worm gear can be driven to rotate, the butterfly plate is driven to open and close the valve body through the valve rod when the worm gear rotates, and when the valve body is opened and closed, due to the fact that the elastic piece is elastic, when the butterfly plate rotates, the elastic piece is not prone to falling off. The top and the bottom of the elastic piece can be slightly deformed according to the shape in the valve seat.

Description

Technical Field

[0001] The utility model relates to the field of butterfly valves, in particular to a low-torque soft-sealing butterfly valve. Background Art

[0002] Butterfly valves, also known as flap valves, are simple and efficient regulating valves widely used for fluid on / off control in low-pressure pipeline systems. Their operating principle is to open and close the valve by rotating the butterfly disc around the valve shaft. This valve is particularly suitable for controlling the flow of a variety of media, including air, water, steam, various corrosive liquids, mud, oil, liquid metal, and radioactive media. The butterfly valve's design enables it to effectively perform shut-off and throttling functions in pipelines. They not only enable rapid opening and closing, but also control flow by adjusting the angle of the butterfly disc to meet the needs of different operating conditions. Furthermore, butterfly valves are widely popular due to their light weight, small footprint, and easy operation, and are suitable for use in a variety of industries, including chemical, power, metallurgy, and environmental protection.

[0003] Conventional butterfly valves currently seal by squeezing the disc and seat radially along the pipeline. This requires overcoming friction between the disc and seat during valve opening and closing, requiring high torque, making opening and closing difficult. Furthermore, friction between the disc and seat can ultimately lead to increased wear on the disc or seat, and even seal failure, shortening the valve's service life. To address this technical issue, this application proposes a low-torque, soft-seal butterfly valve. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings of the prior art and to propose a low-torque soft-sealed butterfly valve. By rotating the turntable, the worm is driven to rotate by the rotating rod, which can drive the worm gear to rotate. When the worm gear rotates, the butterfly plate is driven by the valve stem to open and close the valve body. When the valve body is opened and closed, since the elastic member is elastic, the top and bottom of the elastic member can be slightly deformed according to the shape of the valve seat when the butterfly plate rotates.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A low-torque soft-sealed butterfly valve comprises a valve body for connecting a pipeline, the top end of the valve body is fixedly connected to a fixing rod, the top end of the fixing rod is fixedly connected to a support plate, the top end of the support plate is fixedly connected to a box body, the inner wall of the box body is connected to a worm for reducing torque through a rotating part, the rear end of the worm is fixedly connected to a rotating assembly, the right end of the worm is meshed with a worm wheel for reducing torque, the inner wall of the worm wheel is connected to an elastic part for sealing through an opening and closing assembly, and the inner wall of the valve body is fixedly connected to a valve seat.

[0007] Furthermore, the rotating assembly includes a rotating rod located at the rear end of the worm, the rotating rod is rotatably connected to the rear end of the box body, and the rear end of the rotating rod is fixedly connected to a turntable.

[0008] Furthermore, the opening and closing assembly includes a valve stem located on the inner wall of the worm gear, and the valve stem is rotatably connected to the support plate, the fixed rod and the inner wall of the valve body respectively. The outer wall of the valve stem is fixedly connected to a butterfly plate, and the butterfly plate is arranged on the inner periphery of the elastic member.

[0009] Furthermore, the elastic member is prepared using rubber as raw material.

[0010] Furthermore, two limiting grooves are provided on both sides of the top and bottom of the inner wall of the valve seat, and the two limiting grooves are arranged on the outer periphery of the elastic member.

[0011] Furthermore, a limiting groove 1 is provided on the inner periphery of the valve seat, and the limiting groove 1 is provided on the outer periphery of the elastic member.

[0012] Furthermore, both the front and rear sides of the inner wall of the box body are fixedly connected with rotating shafts, and both the rotating shafts are rotatably connected to the outer wall of the worm.

[0013] The utility model has the following beneficial effects:

[0014] In the present invention, the turntable is rotated, and the worm is driven to rotate by the rotating rod, which can drive the worm wheel to rotate. When the worm wheel rotates, the butterfly plate is driven by the valve stem to open and close the valve body. The combination of the worm wheel and the worm can convert the input rotation into a larger output torque, thereby reducing the operating torque and the force required for the operation, making the operation easier.

[0015] In the utility model, when the valve body is opened and closed, since the elastic member is elastic, the top and bottom of the elastic member can be slightly deformed according to the shape of the valve seat when the butterfly plate rotates. Under the action of the elastic member, the contact area between the butterfly plate and the valve seat is reduced, thereby reducing friction and wear and extending the service life of the butterfly plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a three-dimensional diagram of a low-torque soft-sealed butterfly valve proposed by the utility model;

[0017] Figure 2 This is a schematic diagram of the worm gear structure of a low-torque soft-seal butterfly valve proposed in the utility model;

[0018] Figure 3 This is a schematic diagram of the limit groove structure of a low-torque soft-sealed butterfly valve proposed by the utility model;

[0019] Figure 4This is a schematic diagram of the elastic component structure of a low-torque soft-sealed butterfly valve proposed by the utility model.

[0020] Legend:

[0021] 1. Valve body; 2. Fixed rod; 3. Support plate; 4. Box body; 5. Rotating shaft; 6. Worm; 7. Rotating rod; 8. Turntable; 9. Worm gear; 10. Valve stem; 11. Butterfly plate; 12. Elastic part; 13. Limit groove 1; 14. Limit groove 2; 15. Valve seat. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] Reference Figure 1-Figure 3 The utility model provides an embodiment: a low-torque soft-sealed butterfly valve, comprising a valve body 1 for connecting a pipeline, a fixing rod 2 fixedly connected to the top of the valve body 1, a support plate 3 fixedly connected to the top of the fixing rod 2, a box body 4 fixedly connected to the top of the support plate 3, a worm 6 for reducing torque is connected to the inner wall of the box body 4 through a rotating member, a rotating rod 7 is fixedly connected to the rear end of the worm 6, a worm gear 9 for reducing torque is meshed and connected at the right end of the worm 6, an elastic member 12 for sealing is connected to the inner wall of the worm gear 9 through a valve stem 10 and a butterfly plate 11, and a valve seat 15 is fixedly connected to the inner wall of the valve body 1.

[0024] Specifically, by rotating the turntable 8, the worm 6 is driven to rotate through the rotating rod 7, which can drive the worm wheel 9 to rotate, and when the worm wheel 9 rotates, the butterfly plate 11 is driven by the valve stem 10 to open and close the valve body 1. The combination of the worm wheel 9 and the worm 6 can convert the input rotation into a larger output torque, thereby reducing the operating torque and the force required for the operation, making the operation easier. Moreover, due to the deceleration effect of the worm wheel 9 and the valve stem 10 mechanism, the opening and closing actions of the valve become smoother, and the operator can control the flow and position of the valve more accurately, especially in situations where fine-tuning is required, thereby improving the operating accuracy.

[0025] Reference Figure 1 、 Figure 3 and Figure 4The rotating assembly includes a rotating rod 7 located at the rear end of the worm 6, the rotating rod 7 is rotatably connected to the rear end of the box body 4, and the rear end of the rotating rod 7 is fixedly connected to a turntable 8. The opening and closing assembly includes a valve stem 10 located on the inner wall of the worm gear 9, and the valve stem 10 is rotatably connected to the support plate 3, the fixed rod 2 and the inner wall of the valve body 1 respectively. The outer wall of the valve stem 10 is fixedly connected to a butterfly plate 11, and the butterfly plate 11 is arranged on the inner periphery of the elastic member 12. The elastic member 12 is made of rubber as raw material. A limiting groove 2 14 is provided on both sides of the top and bottom of the inner wall of the valve seat 15. The limiting groove 2 14 is provided on the outer periphery of the elastic member 12. A limiting groove 13 is provided on the inner periphery of the valve seat 15. The limiting groove 13 is provided on the outer periphery of the elastic member 12. The front and rear sides of the inner wall of the box body 4 are fixedly connected with a rotating shaft 5, and the two rotating shafts 5 are rotatably connected to the outer wall of the worm 6.

[0026] Specifically, when the valve body 1 is opened and closed, the elastic member 12 is made of rubber, which is elastic and can provide a good seal to prevent the medium from leaking when the valve is closed. When the butterfly plate 11 rotates, the top and bottom of the elastic member 12 can be slightly deformed according to the shape inside the valve seat 15. Under the action of the elastic member 12, the contact area between the butterfly plate 11 and the valve seat 15 is reduced, thereby reducing friction and wear, extending the service life of the butterfly plate 11, and maintaining the sealing effect, especially under temperature changes or mechanical stress. When the butterfly plate 11 is closed, the elastic member 12 can be engaged in the limit groove 13 to improve the sealing effect. When the butterfly plate 11 is opened, the elastic member 12 can be engaged in the limit groove 2 14 to prevent the butterfly plate 11 from turning too far. Under the action of the rotating shaft 5, the worm 6 can rotate more smoothly in the box body 4.

[0027] Working principle: Install the sealing butterfly valve on the pipeline. When the sealing valve needs to be opened and closed, rotate the turntable 8 to drive the worm 6 to rotate through the rotating rod 7, which can make the worm gear 9 drive the valve stem 10 to rotate, and then drive the butterfly plate 11 to rotate to open and close the sealing valve. When the butterfly plate 11 is closed, the elastic member 12 can be engaged in the limiting groove 13 to improve the sealing effect. When the butterfly plate 11 is opened, the elastic member 12 can be engaged in the limiting groove 2 14 to prevent the butterfly plate 11 from turning too far. When opening and closing the sealing valve, since the elastic member 12 is elastic, when the butterfly plate 11 rotates, the top and bottom of the elastic member 12 can be slightly deformed according to the shape of the valve seat 15. Under the action of the elastic member 12, the contact area between the butterfly plate 11 and the valve seat 15 can be reduced.

[0028] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A low-torque soft-seal butterfly valve, characterized by: The invention comprises a valve body (1) for connecting a pipeline, wherein the top end of the valve body (1) is fixedly connected to a fixing rod (2), the top end of the fixing rod (2) is fixedly connected to a support plate (3), the top end of the support plate (3) is fixedly connected to a box body (4), the inner wall of the box body (4) is connected to a worm (6) for reducing torque through a rotating member, the rear end of the worm (6) is fixedly connected to a rotating assembly, the right end of the worm (6) is meshedly connected to a worm wheel (9) for reducing torque, the inner wall of the worm wheel (9) is connected to an elastic member (12) for sealing through an opening and closing assembly, and the inner wall of the valve body (1) is fixedly connected to a valve seat (15).

2. A low-torque soft-seal butterfly valve according to claim 1, characterized in that: The rotating assembly comprises a rotating rod (7) located at the rear end of the worm (6), the rotating rod (7) is rotatably connected to the rear end of the box body (4), and the rear end of the rotating rod (7) is fixedly connected to a rotating disk (8).

3. A low-torque soft-seal butterfly valve according to claim 1, characterized in that: The opening and closing assembly includes a valve stem (10) located on the inner wall of the worm gear (9), the valve stem (10) being rotatably connected to the support plate (3), the fixed rod (2) and the inner wall of the valve body (1), and a butterfly plate (11) being fixedly connected to the outer wall of the valve stem (10), and the butterfly plate (11) being arranged on the inner periphery of the elastic member (12).

4. A low-torque soft-seal butterfly valve according to claim 1, characterized in that: The elastic member (12) is prepared using rubber as a raw material.

5. The low-torque soft-seal butterfly valve according to claim 1, characterized in that: The valve seat (15) has two limiting grooves (14) on both sides of the top and bottom of the inner wall. The limiting grooves (14) are arranged on the outer periphery of the elastic member (12).

6. A low-torque soft-seal butterfly valve according to claim 1, characterized in that: A limiting groove (13) is provided on the inner periphery of the valve seat (15), and the limiting groove (13) is arranged on the outer periphery of the elastic member (12).

7. The low-torque soft-seal butterfly valve according to claim 1, characterized in that: The front and rear sides of the inner wall of the box body (4) are both fixedly connected with rotating shafts (5), and the two rotating shafts (5) are both rotatably connected to the outer wall of the worm (6).

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